Note-sheet-perforating apparatus.



E. G. CLARK.

NOTE SHEET PERFORATING APPARATUS.

APPLICATION FILED JUNE 8.1914.

1,148,147Z Patented July 27,1915.

4 SHEEIS-SHEET I.

Mam i @m fim COLUMBIA PLANOGRAPH 50., WASHINGTON, 0, I:

E. G. CLARK.

NOTE SHEET PERFORATING APPARATUS.

APPLICATION FILED JUNE 8.1914.

1,148,147. Patented July 27, 1915.

4 SHEETSSHEET 2- 11 a 3% 6g W? COLUMBIA PLANOGRAPH tic-,WASHINUTON. D. c.

E. G. CLARK. NOTE SHEET PERFORMING APPARATUS.

' Patented July 27, 1915.

APPLICATION HLED JUNE 8. 1914. 1,148,147.

4 SHEETS-SHEET 3- F 6/0 wy COLUMBIA PLANOGRAPH (:0 WASHINGTON, D. c.

E. GQCLARK.

NOTE SHEET PERFORATING APPARATUS.

APPLICATION FILED JUNE 8.19M.

1,148,147. Patented July 27, 1915.

4 SHEETS-SHEET 4.

zvizes mia 6M9. $140244? y W W COLUMBIA PLANOURAPH C0,, WASHINGTON, D. c.

remnan rich;

nnnnsr G. CLARK, or DE KALB, ILLINOIS, nssrenoa'ro MELVILLE CLAIR-K PIANO. COMPANY, or CHICAGO, ILLINoIs'n oonrona'rron or ILLINOIS.

notrn-srinnr-rnnronnrrive ArrAnA'rUs.

To all whom it may. concern:

Be it known that I, ERNnsT G. CLARK, a citizen of the United States, residing at De Kalb, in the county of Dekalb and State of Illinois, have invented new and useful Improvements in Note-Sheet-Perforating Apparatus, of. which the following is a speci-v fication, reference being had to the accom-' panying drawings, forming a part thereof.

The purpose of this invention is to provide an improved apparatus for the purpose of manufacturing perforated sheets, com-- monly called note sheets or perforated music, to be used as controllers for automatic musical instruments.

It consists of the elements and features of construction shown and described as indi cated' in the claims.

In the drawings :Figure 1 isa side elevation of an apparatus comprising mechanisms embodying this invention. Fig. 2 is a plan view of the same. Fig. 3 is a detail section at the line 33 on Fig. 2 through the perforating devices. Fig. 4 is a detail'plan new of take-up roll mechanism for the perforated note sheets. Fig. 5 is a similar view. of take-up rollmechanism for the master sheet. Fig. 61s a detail elevation of clutch devices in the driving train adapted for certam purposes hereinafter stated. F g. 7 is a detail plan view of certain paper. feed opk crating devices. Fig. 8 is a detail view of the master sheet feeding devices. Fig. 9 is a section at the line, 9-9, on Fig. 3.

The apparatus shown in the drawings.

comprises a perforating machine proper, the

auxiliary feed for delivering the paper to the perforating machine, and the spool frame for carrying the spools or rolls of paper to be perforated. It will be under stood. that in the usual operation of these machines, a plurality of sheets,.usually from ten to fifteen in number, are fed together in a blanket'and perforated as one, the punches.

striking through the entire blanket. As will hereinafter appear, the perforations of various lengths are all made bypunches whose dimension in the direction of the Specification r Letters Patent. p egm g 2' 1 15, Application filed June 8, 1914. Serial No. 843,631.

paper. Previous to the present invention so far as I am aware onlyv round punches have been used, in any commercial production of perforated note sheets, the step movement of the paper being not over one-third the diameter of the punches, as was necessary in orderto render the perforations, when greater than minimum, even moderately smooth edged. In the present invention, rectangular punches are employed so. that the step. movement ofthe paper may be any,

thing not greater than the dimension of the punch .in the direction of travel, thus di-' minishing by nearly two-thirds the number of strokes necessary for all but the minimum perforations, and correspondingly increasing the rate at which the work can be done I without increasing the rapidity of stroke of the punch apparatus.

It. will be understood that since the paper must be absolutely'a't rest while being penetrated by the punchespthefeed movement must be a step movement with. resting intervals, and since the dimensions of the perforations in the direction of the length of the note sheet must be governed accurately, the step-feed movement of the paper mustbe positive. It will be readily understood, also, that since these note sheets are sometimes of great length, and in any event arecut from paperwhich is prepared in large rolls to reduce the minimum of waste in cutting to the various lengths of the different note sheets, the strain of drawing from, thelarge spools or rolls the ten or fifteen sheets which are cut at a time is very considerable, and if imposed upon the positive step feed mechanism associatedwith thev punching devices would be liable to derange that mechanism or cause it to be rapidly worn to inexactness; and besides this, the elasticity of the paper and'its liability to stretch in the very considerable distance which must exist between the spools or rolls on the spool rack and the point. of grip or engagement of the feeding deviceswith the paper which is necessarily at the opposite side of the punching devices, would be liable to cause inaccurate positioning of the perforations, because \of the varying stress upon the different webs of the paper, some of which might be running from full and consequently heavy spool or roll, while others would be running from a nearly empty and consequently lighter spool. On

this account it is important, and the present invention provides for an auxiliary mecha nism for feeding the paper to it from the spools or rolls and delivering it slack to the opposite feed mechanism associated with the punching devices.

Each sheet after passing through the per forating mechanism is to be inspected for defects and errors andcorrected where they are found, and for this purpose must be gone over in the same direction in which the perforating is performed; and for this reason, it is desirable not to wind up the spool or individual sheets as they come from the perforating machine, because they would have to be unwound in order to perform the next process upon them, beginning in the same direction as the perforating was done. But for the purpose of detecting the errors, which will be the same in the entire quantity of sheets cut at one time, one sheet is desirably spooled so that it may be ready to mount in a player for the purpose of observing its accuracy or inaccuracy and mark in the necessary corrections as a pattern by which to correct the remaining sheets of the cutting. For this purpose, therefore, a takeup spool is provided for one sheet of the set. Since the sheets are fed at a uniform speed throughout the entire length, whereas, the spool upon which the specimen sheet is to be wound wonldtend if rotated at a uniform speed to take up the sheets faster and faster as the diameter of the roll increased upon it, it is necessary to provide for rotating this take-up roll in a manner which will adapt it to accommodate its winding or draft upon the paper to the steadily changing conditions noted, and this is accomplished by rotating the take-up roll frictionally at a speed which will be adequate to take up the sheet as it comes from the perforating mechanism substantially at the speed at which it was delivered, so that it will not draw the sheet ufn'duly when the spool is wound to larger diameter.

Heretofore, it has been possible to out only a single blanket of sheets at each running of the master over the tracker. One purpose of the present invention is to provide a machine which the one master at each running may control the operation of as many multiples of the perforating mechanism as may be constructed and assembled in one machine for simultaneous and synchronous action, thus producing at one running as many cuttings or multiples. of the number of sheets run in each blanket,ten to fifteen, as the case may be,as there may be multiples of the cutting devices provided in the machine. As illustrated in the drawings, the cutting mechanism is duplicated only, so that two blankets are run at a time for perforation under the control of one mas ter. It will be understood that the number feed movement in the intervals of is limited only by the stiffness of the dies and supporting mechanism.

It, will be understood from the drawings and the hereinafter contained detail de scription, that the punching is done by 1 means of a reciprocating head making strokes as frequently as consistent with giving the blanket of note sheets proper step the strokes; and it may be understood that it is frequently necessary to interrupt the'operation for the purpose of observing the work, or because of the operators attention being withdrawn for a time.- In machines of this character as heretofore constructed, it was liable to happen upon disconnecting the driving power that the reciprocating head operating the punches would stop in the down stroke of the punches, and with the punches, therefore, in the process of penetratin or having penetrated the blanket of note sheets, so that if the purpose of stopping was to inspect the cutting, it was necessary to rotate the shaft by hand sufficiently to withdraw the punches. The extent to which the mechanism was operated by hand would throw it out of time with the master sheet and would result in losing or gaining a stroke, and to that extent introducing error into the cutting. To avoid this difficulty, the present invention comprises a disengageable clutch mechanism for the driving shaft by which the reciprocating punch-operating head is actuated, adapt ed to insure the completion of the cycle of the punching action to the end of the recycle the clutch is disconnected.

The invention comprises also the specific construction of the punch-actuating mechanism by which the punches to be operative at each stroke are selected under the control of the inaster'sheet.

The details of the mechanism will now be described.

Upon a rigid frame, 1, there is journaled the main power shaft, 2, of the machine, having loose upon it for rotation the main drive pulley or power wheel, 3. This wheel is driven by a clutch connection with the shaft which comprises a clutch member consisting of a collar, it, fast on the shaft and having fulcrumed upon it any convenient number of clamping dogs, a whose camshaped ends, 4 serve when the dogs are A shippinglever,

moved toward .the wheel, 3, the cone-shaped end of the collar engaging the clutch dogs causes them to force the clutch disk, 5, into driving engagement with the wheel, The opposite end of the collar, 6, is formed to produce a shoulder, 6 and the adjacent bearing of the shaft, 2, is provided with a stop device, 8, having a corresponding shoulder, 8, fixed with respect to said bearing. lVhen the clutch collar, 6, is moved by the lever, 'Z, away from the wheel, 3, the frictional engagement of the wheel with the shaft through the medium of the friction disk, 5, and the collar,4, fast on the shaft, is released, and the momentum of the parts previously driven by the shaft is sufficient to complete any stroke ofthe punch head which may have been given before this disengagement was caused; and the operator moving the clutch by one stroke, not only so as to release the frictional engagement, but also to carry the sleeve over against the bearing having the shoulder, 8 the shaft and the parts operated thereby will be brought to rest, only when the shaft and collar have completed the revolution necessary to bring the shoulders, 6 and 8, into encounter with each other; and said shoulders being relatively positioned to cause such encounter to occur upon the completion of the retracting stroke of the punch device, such stroke is certain to be completed,

whatever he the point in the cycle of the operation at which the clutch collar maybe moved for disengagement from, the drive wheel.

Upon the bed there are erected vertical guides, 10, upon which the reciprocating head, 11, is guided in working and retract in stroke said stroke bein aroduced'b pitmen, 11, connected at their lower end with eccentrics, one of which 1s shown atc12 on Fig.3, on the shaft, 2.- Upon the bed or frame, 1, between the shaft, 2, and thehead,

11, there is mounted in fixed position a die and punch guide, 15, 16. These two parts are rigidly united as if unitary in the operation of the machine, but are separable for constructional and repair purposes, as hereinafter more particularly explained. In the punch guide member, 16, there are mounted.

for vertical reciprocation, and fitted as closely asthe punch is fitted to a die with which it is to coiiperate, punches, 20, one for passing thus between the die, 15, belowsaid blanket and the punches, 20, overhanging the blanket. The punches extend up above the punch guide-way, 16, for engagement 7 with the reciprocating head, 11. For the purpose of such engagement the head is made in channel form, the upright sides of the channel, 11 being guided on the posts, 10, and the web of the channel being at the lower side and having the means for engaging the punches and carrying the punch selectors hereinafter explained. This web has apertures, 11, one for each of the punches. The punches are formed each with a recess, 20, in one edge near the upper end, and there is made fast to the under side of the head, being let into a channel .formed in said under side for it, a check plate, 11 which has one edge reduced in thicknessto form a lip, 11 which protrudes into the recesses, :20, of the punches, and whose thickness is less than the vertical extent of said recesses by the amount of the full stroke desired to be given the punches. The punches at their upper end are flush with the upper surface of the Web, 11, of the head, 11, when the punches are at their lowest position,r-that is, having the upper end of the recess, 20, engaged on the upper surface of the lip, 11 On the web, 11 of the head, in the vertical plane of the respective punches, transverse to the row of punches, there are mounted for sliding transversely to the row the punch selectors, 22. These punch selectors are guided in comb, 23, mounted upon the upper side of the web, 11 ofthe head, and slotted on its under side to afford guide channels for the punch selectors, thus giving it the comb form. Each of the punch selectors has an upstanding finger, 22, to which is connected one end of a spring, 24, the other end of which is concomb, whereby the springs tend to hold the punch selectors back to the limit of their path of sliding in the comb, this position .being that shown in Fig. 3, at which the recess or notch, 22, in the lower edge of the selector directly overhangs the upper end of the punch so that the punch is free to move up from its position shown in said Fig. 3 into said recess or notch. selector there is provided a motor pneumatic, 80, connected to the selector by a rod, 31, so that the collapse of the pneumatic will cause itto actuate the selector, drawing it out from the position shown in Fig. 3 to a position at which the recess or notch, 22, is withdrawn from above the punch, so that an uninterrupted portion of'the lower edge of the selector. extends across the top of the punch aperture in the head, andthe selector thereby positively blocks the upward move- -ment of the punch with respect to the head.

It willbe seen that the reciprocation of the head tending to carry all the punches down will carry down positively all those punches For each punch whose selectors have :been drawn out by their motor pneumatics to a position at which they block the upthrust of the punch with respect to the head. That is to say, the punch selector thus drawn forward becomes an operating part of the head for positively forcing downward the punch when the head is depressed; but all those punches having their selectors unaetuated by their motor pneumatics, and standing therefore, in the position with relation to the punches which is shown in Fig. 3, will not be carried down by the downward movement of the head, because, in the first place, the punches fit so tightly in the punch guide member, 16, and, second, because the resistance of the work,- that is,the blanket of sheets to be perforrated,which the punch would encounter in its lower end upon its first downward movement, would prevent it being carried further downward, there being no force derived from its connection with the head sufficient to even indent the paper.

Assuming now a pneumatic action'controlled after the usual manner of pneumatic actions for pneumatic players,that is, by a perforated sheet,and operating the motor pneumatics, 80, precisely as motor pneumatics in a player mechanism would be operated for producing the playing stroke upon the keys, it will be seen that a punch selector will be pulled forward into punchblocking position whenever with respect to the travel of the note sheet or master sheet over the tracker a note would be struck, if such note sheet or master were being used for controlling playing instead of for controlling punching; and that the selector will be held in such outdrawn position as long as the key would be held down for playing. And understanding that the head, 11', is being reciprocated constantly, it will be seen that the punches brought into operation by the blocking of their movement in the head by their selectors will perforate the blanket of note sheets by as many successive strokes, and will thereby produce as extended perforations in the note sheets, as would correspond to the duration of the notes which would be sounded if the master sheet were being used for controlling the playing of an automatic player. The result is obviously that the note sheets become substantially fac simile reproductions (without regard to scale or comparative size) of the master sheet.

ing shown at 50, run fromits spool, 51', over the tracker, 52, to itstake-up roll, 53. The master is actuated positively by pin teeth,

54-, upon a feed roll, 55, about which the is not relied upon mainly to propel the master, but merely to rectify its position in case of slippage between the friction grip rolls, 57 and 58, which mainly serve for propulsion of the master over the tracker.

Since the diameter of the roll of paper on the take-up roll constantly increases as the masteris wound on to 1t, uniformity of lineal travel of the master over the tracker involves a constantly decreasing rate of ro tation of the take-up roll, and this is provided for by mounting the take-up roll loose for rotation on the shaft, 57, and driving it by the friction against one end of the roll, of a collar, 59, which is feathered on the shaft for rotation therewith, and pressed against the end of the take-up roll by a spring, 60, on the shaft, suitable frictional facing, 61, being provided on the end of the collar, '59, abutting the take-up roll.

The description thus far has related only to one reciprocating head and die and punches for perforating a single blanket of note sheets 5' but it is preferred, as hereinafter indicated, to construct the machine with a plurality of dies, or with dies long.

enough to extend over a plurality of note sheets, or blankets of note sheets, positioned and running side by side, and all operated 'by the same reciprocating head. The selectors for the several dles have similar pneumatic actions connected with them, and corresponding motor pneumatics of the several actions have branching connections from the same duct of the tracker over which the single master sheet runs. lhus upon the passing of a given perforation of the master over the corresponding duct of the tracker, the corresponding motor neumatics of the several pneumatic actions are operated to move the corresponding selectors pertaining to the corresponding punches cooperating with the several dies or portions of the continuous die, so as to perforate in identical manner the several blankets of note sheets which are simultaneously and synchronously fed through the die throat, 17.

In the drawings, there are shown two traveling blankets side by side; and it be understood that the head, 11, shown in Figs.

2 and 9, extending across both blankets, carries the punches, 20, for two complete dies, 15, and punch guide, 16, or the equivalent thereof, in a single die having two complete sets of die apertures, and punch guides having two complete sets of guide apertures; and it may be understood that in Fig. 9, the opposite end portions shown of dies, 15, and punch guide, 16, are portions, respectively, of two complete dies and punch guides, corresponding to and lying under the two blankets respectively, which are seen in Fig. 2, also extending across under both blankets.

In practice, it has been found entirely feasible to make a die member in all its parts, including the punch guide member and the clamp members, which will be hereinafter described, long enough for perforating two blankets, side by side; that is, the several parts of the die can be made sufficiently stiff in this way, and the head is also sufficiently stiff in the length necessary to cotiperate with the double-length die, withoutrequiring intermediate guide bearings for actuating the pitmen connections; but it will be readily understood that if the structure were extended to cover a larger number of blankets, requiring the total length of the die members to be such that their stifiness without support intermediate the ends would be inadequate, the principle of construction herein shown would permit making the die members rigid without integrality and providing the head with inter mediate guides and actuating pitmen;

The feed action for propelling the blanket of sheets to be perforated past the perforating die by step movement taken in the intervals between the cutting strokes of the punch. head is located beyond the die, the blanket of paper sheets being necessarily pulled and not pushed for advancing it. For this purpose there is mounted upon the frame for each die contained in the machine an endless carrier consisting of two parallel endless belts or chains, 80, 80, running about actuating and idler wheels, 81, 82, respectively, journaled in the frame, As illustrated, the actuating wheels, 81, are those at the inner end of the carrier, being fast on a shaft, 81 journaled in the frame and having rigid with it a ratchet wheel, 83, which is engaged by a pawl, 84, for giving the chains or belts their step movement. The pawl, 8a, derives its reciprocating movement by means of a connecting rod, 85, from an eccentric, (not shown) on the shaft, 2. The feeding devices for carrying the blanket of paper sheets comprise transverse bars, 87, connecting opposite links of the parallel chains, 80. Said bars are provided with gripping fingers, 88, which are moved to overhang the margins of the blanket when the bars are beingcarried bythe upper ply of the chains, and are withdrawn from this overhanging position by means of cams, 89, which are mounted upon a transverse bar, 90, of the frame in position tobe encountered by the fingers near the delivery end of the conveyers path before the bars pass around the actuating wheels, 81. The gripping finger's 'are controlled for movement back into position overhanging the blanket margins after the bars have come up around'the act'uatii'rg'wheels, 81, at the receiving end of the conveyer by cams, 91, on the transverse bar, 92; Said fingers are further actuatedfor gripping the paper after they have been moved for overhanging at the receiving end by means of cams, 93, mounted upon the same'transv'erse bar, 92, which c'arri'es the cams, 91, at the receiving end, and are actuated for releasing'the grip by cams, 95,

on the bar, 90, near the delivery end. The detail structure and operationof these devi'c'es for; gripping and releasing the paper need not'be further described, being not specifically a part of this invention, and being fully shown and described inmy Patent No. 1,108,388, dated August 25, 1914.

e3- represents the spool" stack or frame on whlch are supported the rolls of paperfrom which the webs are drawn to the blanket to be perforated. No specific description of this stack will be necessary, beyond noting that it is a suitable framework for affording bearingsfor as 'many rolls as desired, and that it is positioned at a sufficient distance from the frame, 1, of'the perforating machine to admit between the two the supplemental paper feed mechanism which is mounted ona frame, 70. The webs of paper from the several spools are, accumulated, one above another, in a blanket which extends over the frame, 70, and which is shown at 71 drooping betweensaid' frame, 70, and the proximate end of the frame, 1, of the perforating machine, thus affording slack upon which the step feed devices of the perforating machine draw, and relieving said step feed devices of the burden of drawing the webs from the rolls, 62,1011 the roll stack. This work of drawing theweb from the rolls to deliver it slack to the perforating and step-feeding mechanism is done by a conveyer and feeding device L mounted on the frame, 70, which comprises a pair of endless belts or chains, 73, and carried by sprocket wheels, 74, 7 1, and 75, 7 5, journaled on said frame, 70. This conveying and feeding device is in all respects precisely similar to that already described located beyond the dies, having thesame transverse bars with their gripping fingers and equipped with the'same cam devices for protruding and withdrawing" the fingers and causing them to clamp and release the blanket of paper sheets. The shaft, 73*, 011 which the actuating wheel, 7 5, of this auxiliary'conveyer and feeding device is mount ed is driven by a belt, 81", from' a wheel, 81 on the shaft, 81 to a wheel, 81 of the same diameter as 81 fast on said shaft, 7 3, whereby'the auxiliary conveyer has the same rate of paper feeding movement as theother conveyer.

For trimming the margins of the sheets, there are attached to the reciprocating punch head, 11,rigidshear bars, one such shear bar being mounted in proper position to shear each edge of each blanket of sheets; that is, two shear bars for each die or portion of die comprising the complete number of die apertures for a perforated note sheet. These shear bars comprise a vertical arm, 96, and an inclined foot or shear blade, 97, the vertical arm being bolted rigidly to the forward side of the punch head, 11. The foot or shear blade has'its lower edge, which is the cutting edge, inclined down forward in the direction of travelof the blanket and positioned to thrust past a straight longitudinally extending edge of a companion shear plate, 98, which is mounted in fixed position on the bed which supports the die, and forms a portion of the support of the blanket as it runs from the die. By this means, the fixed shear plate, 98, having its edge invariably positioned with respect to the die apertures, the margins of the note sheets are invariably uniformly distant from the nearest row of perforations made by the die.

The drawings show exhausting devices for operating the pneumatic action consisting of duplex bellows, 100, 101, mounted on the floor underneath the frame and having their vibratingvmembers actuated by pitmen, 102, 103, fromlcrank shafts, 104, 105, journaled on the frame and rotated by belts from any convenient rotating shaft, as illus trated.

All but one of the sheets or webs of paper in each blanket are allowed to be delivered in a pile, as shown at 106, on a shelf, 107, mounted at the delivery side of the frame. The top sheet or perforated web of each blanket is wound on to a take-up spool, 108. The several take-up spools are each mounted loose on a shaft, 109, which is journaled in brackets, 110, at the delivery end of the frame. The shaft, 109, is rotated by a belt, 111, passing about a pulley, 112, on the end of the shaft, 82, and a pulley, 113, on the end of the shaft, 109. Fast on the shaft, 109, there is for each of the spools a stop collar, 114, and a friction collar, 115, and a spring, 116, reacting against the friction collars to hold them in frictional contact with the adjacent ends of the spools, respec tively. By this means, the two pulleys, 112

and 118, being so proportioned that without p any slip of the belt or of the friction collars on the spools, respectively, the spool will be rotated at a proper speed to take up the web substantially as fast as it is fed through the machine when the web begins to be wound on the spool, the slippage of the beltor ifthe belt is not allowed to slip then the slippage of the friction collars on the spoolswill accommodate for the increasing diameter of the rolls as the webs are wound on the spools.

I claim 7 1. In a note-sheet-perforating machine, in combination with synchronously operated mechanisms for propelling a plurality of note sheets side by side; a like plurality of punch and die mechanisms for perforating the sheets alined across all the paths of travel of the note sheets and positioned opposite said paths respectively; pneumatic punch-selecting and controlling mechanisms for the respective dies; a single tracker and connections therefrom to each of the punchselecting mechanisms; a single master sheet mounted for traveling over the tracker, and mechanism for propelling it positively thereover. I

2. In a note-sheet roll perforating machine, in combination witha die having a multiplicity of die apertures and a punch guide'member rigid therewith having a corresponding number of punch guideways; punches mounted in said guideways for thrust into the die apertures and extending above said guideways; a reciprocating punch driver mounted above the punch guide member; selectors mounted on the punch driver in the vertical planes of the respective punches transverse to their alinement with each other for reciprocation in said planes respectively transversely to said alinement, said selectors having each a recess in its edge toward the punch which the punch may enter at one position of the selector in its path of reciprocation; pneumatics for operating the selectors respectively to carry the recesses out of alinement with the respective punches, and a tracker and master sheet for controlling the pneumatics.

3. In a note-sheet roll perforating machine, in combination with a die having a multiplicity of die apertures and a punchguide member rigid therewith having a corresponding number of punch guide ways; punches mounted in said guide ways for thrust into the die apertures and extending above said guide ways; a reciprocating punch driver mounted above the punch guide member; selectors mounted on the punch driver in the vertical planes of the respective punches transverse to their alinement with each other for reciprocation in said planes respectively transversely to said alinement, said selectors having each a recess in its edge toward the punch which the punch may enter at one position of the selector in its path of reciprocation; springs reacting on the selectors respectively to hold them yieldingly in said position pneumatics for operating the selectors respectively to carry the recesses out of alinement with the respective punches, and a tracker and master sheet for control ling the pneumatics.

4. In a note sheet roll perforating machine in combination with a die, a punch guide member rigid therewith having punch guide-ways; punches mounted in said guideways and extending there-above; a reciprocating punch driver mounted above the punch guide member; punch selectors mounted on the punch driver, having each a recess in its edge toward the corresponding punch, adapted to be entered by the latter;-

pneumatics for operating the punch selectors respectively longitudinal; the punches having each at their portion which extends in the punch driver an edged recess, and the punch driver having a lip which engages said recess, the length of the recess being in excess of the thickness of the lip which protrudes into it, by substantially the amount of the perforating stroke of the punch.

- In testimony whereof, I have hereunto set my hand at De Kalb, Illinois, this 17 day of April, 1914,.

ERNEST Gr. CLARK.

Witnesses:

M. L. FoHR, H. B. SANFORD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents, Washington, D. O. 

